2016-01-13 67 views
0

我目前正在学习如何使用磁带进行单元测试。我已经能够验证在我的测试中发生了错误。但是,我们如何验证使用Error引发的消息等于预期的消息?如何使用磁带验证错误消息?

实施例的单元测试:

var test = require('tape'), 
    ExampleObject = require('/path/to/ExampleObject'); 

test("Pass invalid argument to function", function(assert){ 
    assert.throws(function(){ 
     new ExampleObject(undefined, "validParameter") 
    }, TypeError, "Should throw TypeError for firstParam"); 

    assert.end(); 
}); 

ExampleObject:

function ExampleObject(param1, param2){ 
    if(typeof param1 !== 'string') { 
     throw new TypeError('ExampleObject - typeof for param1 should be string'); 
    } 
    if(typeof param2 !== 'string') { 
     throw new TypeError('ExampleObject - typeof for param2 should be string'); 
    } 

    /* 
    /do stuff 
    */ 
}; 

提前感谢!

回答